Open Access
Science advances, volume 3, issue 9
Stoichiometric control of the density of states in PbS colloidal quantum dot solids
Daniel M Balazs
1
,
Klaas I Bijlsma
1
,
Hong‐Hua Fang
1
,
Dmitry N. Dirin
2, 3
,
Max Döbeli
4
,
Maksym V. Kovalenko
2, 3
,
Publication type: Journal Article
Publication date: 2017-09-27
PubMed ID:
28975153
Multidisciplinary
Abstract
Electronic structure engineering is achieved in colloidal quantum dot solids by surface-based stoichiometry adjustment. Colloidal quantum dots, and nanostructured semiconductors in general, carry the promise of overcoming the limitations of classical materials in chemical and physical properties and in processability. However, sufficient control of electronic properties, such as carrier concentration and carrier mobility, has not been achieved until now, limiting their application. In bulk semiconductors, modifications of electronic properties are obtained by alloying or doping, an approach that is not viable for structures in which the surface is dominant. The electronic properties of PbS colloidal quantum dot films are fine-tuned by adjusting their stoichiometry, using the large surface area of the nanoscale building blocks. We achieve an improvement of more than two orders of magnitude in the hole mobility, from below 10−3 to above 0.1 cm2/V⋅s, by substituting the iodide ligands with sulfide while keeping the electron mobility stable (~1 cm2/V⋅s). This approach is not possible in bulk semiconductors, and the developed method will likely contribute to the improvement of solar cell efficiencies through better carrier extraction and to the realization of complex (opto)electronic devices.
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Citations by publishers
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5
10
15
20
25
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American Chemical Society (ACS)
23 publications, 34.33%
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Wiley
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Springer Nature
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2 publications, 2.99%
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Multidisciplinary Digital Publishing Institute (MDPI)
2 publications, 2.99%
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Pleiades Publishing
1 publication, 1.49%
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IEEE
1 publication, 1.49%
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Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii
1 publication, 1.49%
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IOP Publishing
1 publication, 1.49%
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5
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25
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Balazs D. M. et al. Stoichiometric control of the density of states in PbS colloidal quantum dot solids // Science advances. 2017. Vol. 3. No. 9.
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Balazs D. M., Bijlsma K. I., Fang H., Dirin D. N., Döbeli M., Kovalenko M. V., Loi M. A. Stoichiometric control of the density of states in PbS colloidal quantum dot solids // Science advances. 2017. Vol. 3. No. 9.
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TY - JOUR
DO - 10.1126/sciadv.aao1558
UR - https://doi.org/10.1126/sciadv.aao1558
TI - Stoichiometric control of the density of states in PbS colloidal quantum dot solids
T2 - Science advances
AU - Balazs, Daniel M
AU - Bijlsma, Klaas I
AU - Fang, Hong‐Hua
AU - Dirin, Dmitry N.
AU - Döbeli, Max
AU - Kovalenko, Maksym V.
AU - Loi, Maria Antonietta
PY - 2017
DA - 2017/09/27 00:00:00
PB - American Association for the Advancement of Science (AAAS)
IS - 9
VL - 3
PMID - 28975153
SN - 2375-2548
ER -
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@article{2017_Balazs,
author = {Daniel M Balazs and Klaas I Bijlsma and Hong‐Hua Fang and Dmitry N. Dirin and Max Döbeli and Maksym V. Kovalenko and Maria Antonietta Loi},
title = {Stoichiometric control of the density of states in PbS colloidal quantum dot solids},
journal = {Science advances},
year = {2017},
volume = {3},
publisher = {American Association for the Advancement of Science (AAAS)},
month = {sep},
url = {https://doi.org/10.1126/sciadv.aao1558},
number = {9},
doi = {10.1126/sciadv.aao1558}
}